A lot of people like HS-6 in the J frame with the 158 lead bullet to reach +P speeds......
Just that I got to 6.8 grs with only 792 fps and the recoil was pretty harsh, so I did not go for the top loads.

4.0grs of Red Dot gets me 800 fps with a lot less recoil while
Universal gave me 824 fps that had less recoil than the HS-6 loads.

I found out that with a heavy crimp that you can use LESS powder and still GAIN in
the fps department with most powders.... with lead bullets.

The JHP bullets can only take so much of a crimp before the copper or bullet is damaged.